Amanda Seyfried is entering a new decade.

On Wednesday, December 3, the Mean Girls actress rang in her milestone 40th trip around the sun, one day after stepping out in New York City alongside co-star Sydney Sweeney to celebrate the release of their new thriller together, The Housemaid .

It has been a busy year for the star, who in addition to releasing The Housemaid , out December 19, is also celebrating the release — and success — of another movie, the musical drama The Testament of Ann Lee , which is out December 25, and has already earned her Oscar buzz after its festival circuit.

© Getty Images Amanda at The Housemaid premiere on December 2

Speaking on CBS Sunday Mornings on the November 30 episode, Amanda, who lives in a farm in upstate New York with her husband T

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